Monkey-wrench



JACOB KOCHA, OF WARRIOR RUN, PEELY, PENNSYLVANIA.

MONKEY-WRENCH.

Specification of Letters Patent. Patented Apr, 2.7, 1920.

Application filed .Tune 20, 1919. Serial No. 305,544.

To all whom t may concern Be it known that I, JACOB KOOHA, a citizen of Poland, residing` at Warrior Run, leely, county of Luzerne, and State of Pennsylvania, have invented certain new and useful Improvements in Monkey- 1Wrenches, of which the following is a specilication.

rlhis invention has as its principal object to provide a wrench capable of gripping either a rectangular or cylindrical object in a firm and secure manner.

A further object is to provide a wrench in which the sliding jaw is rapidly and conveniently actuated.

These objects are attained by the novel construction and combination of parts 'hereinafter described and shown in the accompanying drawings, forming a material part of this disclosure, and in which-- Figure 1 is a side elevational view showing a wrench made in accordance with the invention, parts being broken away in order to disclose the interior construction.

Fig. 2 is a fragmentary rear plan view and section, the section being taken on line 2-2 of Fig. 3, and drawn to an enlarged scale, and

Fig. 3 is a transverse sectional view taken on line 3-3 of Fig. 2.

Referring to the drawings in detail, the shank or bar 10 of the wrench is shown to be rectangular, the tang being reduced in size, passing axially through the handle 11 so as to be held by the nut 12 at its extreme outer end.

Formed with the shank 1() at its outer end, is a fixed head 13 from which extends a jaw 14, having a beveled outer surface 15, a similar fixed jaw extending from the oppositeV end of the head, the -jaw being concavely recessed on the inner side and provided with teeth 16.

The sliding jaw 17 has an extending element 18 matching the iixed jaw 14, while upon the other side is a projection containing a concave recess 20, registerable with the recess 16 of the fixed jaw.

Secured upon the lower side of the movable jaw 17, is a plate 21, held in engagement by 'a' screw 22, to the lower side of the jaw 19, in which is a recess 23 to receive one end ofthe screw-threaded adjusting rod 24, the screw threads of which engage with similar internal threads formed in the plate 21.

The ends of the rod 24 are formed with screw threads engaging in a fixed cylindrical block 27, set in a recess 28, formed in an extension 29 of the handle 11.

Slidably engaged on the screw elements 24 and 26 is an external worm 25, its threads 30, engaging in the rack teeth 31, on one of the narrow edges of the wrench shank 10, the exterior of the worm being knurled as at 32 so as to be readily rotated by the thumb and fingers of an operator.

Extending out from the central circular bore of the worm 25 is a recess 33 in which, mounted on the pin 34, is a lever 35, having an operating handle 36, protruding from the side of the worm, the lever being pressed normally inward by a flat spring 37, and is provided with an offset portion 38, terminating in an angular cylindrical detent 39,

adapted to enter into any of the spaced radial circular openings 40, formed in the portion 26 of the threaded rod, so-that upon depressing the handle 36, the worm 25 may be adjusted longitudinally of the screw threaded rod, causing the point to enter into any of the openings 40 so as to be locked .with the rod and communicate rotary motion thereto, when the worm is rotated, thereby actuating the movable jaw in a rapid manner. The adjustment of the worm will permit a setting of the tool for gripping any number of objects of a predetermined size in succession when locked in its adjustment, and besides, when set at the lowermost point of the rack 31, it will allow an opening of the jaws to their full extent for gripping very bulky objects.

A facing disk 41, formed with the worm, on the side adjacent to the plate 21 serves to protect the detent point 39 as it is moved by the lever, and also to avoid jamming the worm against the plate.

The operation of the wrench is obvious from the foregoing description from which it will be seen that a rapid transit wrench of novel construction has been disclosed.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is-

In a wrench, the combination with a rectangular shank having a handle and a fixed head at the opposite end of said shank,

of a jaw movable on said shank, a rack formedf on said shank7 a nut engaged with said movable jaw, a rod having right and left hand screw-threads from its center, said right hand endk being engageable Within said nut, a nut iXed in said handle engageable with the left hand end of said rod, a Worm slidable over said rod, said Worm engaging with the rack on said shank7 a lever pivoted Within a recess in said worm, 10

means for actuating said lever, a detent formed with said lever, and spaced openings in said rod engageable With said detent whereby said Worm may be adjustably engaged With said rod at spaced intervals.

In testimony whereof I have afliXed my signature.

JACOB KOCHA.Y 

